Synthesis And Absorbency For Organics Of Modified Natural Aterial-acrylate Composite Resins

In this paper, the aim of our work is working out an efficient high oil acrylic resin.The shell powder-acrylate composite resin and chitosan-acrylate composite resin weresynthesized with butyl acrylate and butyl methacrylace as monomer, hydrophobic naturalshell powder and chitosan, which were modified by three kinds ofsurfactants.Vinyltriethoxysilane (A151), Sodium dodecyl sulfate (SDS), Hexadecyltrimethyl ammonium Bromide (CTAB) were chosen to modified powders forhydrophobicity. With hydrophobic test and IR analysis, the effects of different amount ofsurfactants were studied, then the optimal condition for powder hydrophobicity wereestablished which prepared for followed experiments.The shell powder-acrylate resin was synthesized by microwave irradiation method.The oil absorbency of the composite resin would be enhanced by modified shell powder.The mixture of reacting agents included the monomers (BMA and BA), initiator (BPO),cross-linker (MBA), pore-forming agent (ethyl acetate), dispersant (PVA) andhydrophobic chitosan, the synthetic progress was in the presence of nitrogen. The shellpowder-acrylate resin was characterized by scanning electron microscope and thermalgravimetric analysis. The maximum adsorption capacity was29.6g/g in CCl4in optimalcondition. The adsorption kinetic data followed the pseudo second-order kinetic model.Modified chitosan-acrylate composite resin was synthesized by suspensionpolymerization method. Chitosan was modified by A151, with factors analysis andorthogonal experiment, the optimal conditions were as follows: reaction power was100W,time of reaction was1h, the ratio of monomers was1:1.5, BPO was2.0%(wt), crosslinkerwas1.5%(wt), PVA was10%(wt), modified chitosan was1.0%(wt). Adsorptioncapacity was found to be maximum (53g/g in CCl4,44g/g in CHCl3, and29g/g intoluene) at optimal condition. The as-prepared resin presented porous microspheresstructures and the volume expansion rate reached50times (before and after adsorptionorganics). The dynamic behavior of CCl4adsorption by chitosan-acrylate composite resincould be well fit by the pseudo first-order kinetic model.